package com.atguigu.eduservice.service.impl;

import com.atguigu.eduservice.entity.EduCourse;
import com.atguigu.eduservice.entity.EduCourseDescription;
import com.atguigu.eduservice.entity.frontvo.CourseFrontVo;
import com.atguigu.eduservice.entity.frontvo.CourseWebVo;
import com.atguigu.eduservice.entity.vo.CourseInfoVo;
import com.atguigu.eduservice.entity.vo.CoursePublishVo;
import com.atguigu.eduservice.mapper.EduCourseMapper;
import com.atguigu.eduservice.service.EduCourseDescriptionService;
import com.atguigu.eduservice.service.EduCourseService;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 课程 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2020-03-02
 */
@Service
public class EduCourseServiceImpl extends ServiceImpl<EduCourseMapper, EduCourse> implements EduCourseService {

    //课程描述注入
    @Autowired
    private EduCourseDescriptionService courseDescriptionService;



    //添加课程基本信息的方法
    @Override
    public String saveCourseInfo(CourseInfoVo courseInfoVo) {
        //1 向课程表添加课程基本信息
        //CourseInfoVo对象转换eduCourse对象
        EduCourse eduCourse = new EduCourse();
        BeanUtils.copyProperties(courseInfoVo,eduCourse);
        int insert = baseMapper.insert(eduCourse);
        if(insert == 0) {
            //添加失败
            throw new GuliException(20001,"添加课程信息失败");
        }

        //获取添加之后课程id
        String cid = eduCourse.getId();

        //2 向课程简介表添加课程简介
        //edu_course_description
        EduCourseDescription courseDescription = new EduCourseDescription();
        courseDescription.setDescription(courseInfoVo.getDescription());
        //设置描述id就是课程id
        courseDescription.setId(cid);
        courseDescriptionService.save(courseDescription);

        return cid;
    }

    //根据课程id查询课程基本信息
    @Override
    public CourseInfoVo getCourseInfo(String courseId) {
        //1 查询课程表
        EduCourse eduCourse = baseMapper.selectById(courseId);
        CourseInfoVo courseInfoVo = new CourseInfoVo();
        BeanUtils.copyProperties(eduCourse,courseInfoVo);

        //2 查询描述表
        EduCourseDescription courseDescription = courseDescriptionService.getById(courseId);
        courseInfoVo.setDescription(courseDescription.getDescription());

        return courseInfoVo;
    }

    //修改课程信息
    @Override
    public void updateCourseInfo(CourseInfoVo courseInfoVo) {
        //1 修改课程表
        EduCourse eduCourse = new EduCourse();
        BeanUtils.copyProperties(courseInfoVo,eduCourse);
        int update = baseMapper.updateById(eduCourse);
        if(update == 0) {
            throw new GuliException(20001,"修改课程信息失败");
        }

        //2 修改描述表
        EduCourseDescription description = new EduCourseDescription();
        description.setId(courseInfoVo.getId());
        description.setDescription(courseInfoVo.getDescription());
        courseDescriptionService.updateById(description);
    }

    //根据课程id查询课程确认信息
    @Override
    public CoursePublishVo publishCourseInfo(String id) {
        //调用mapper
        CoursePublishVo publishCourseInfo = baseMapper.getPublishCourseInfo(id);
        return publishCourseInfo;
    }

    @Override
    public
    void removeCourse(String courseId) {

    }


    @Override
    public
    Map<String, Object> getCourseFrontList(Page<EduCourse> pageCourse, CourseFrontVo courseFrontVo) {

            //2 根据讲师id查询所讲课程
            QueryWrapper<EduCourse> wrapper = new QueryWrapper<>();
            //判断条件值是否为空，不为空拼接
            if(!StringUtils.isEmpty(courseFrontVo.getSubjectParentId())) { //一级分类
                wrapper.eq("subject_parent_id",courseFrontVo.getSubjectParentId());
            }
            if(!StringUtils.isEmpty(courseFrontVo.getSubjectId())) { //二级分类
                wrapper.eq("subject_id",courseFrontVo.getSubjectId());
            }
            if(!StringUtils.isEmpty(courseFrontVo.getBuyCountSort())) { //关注度
                wrapper.orderByDesc("buy_count");
            }
            if (!StringUtils.isEmpty(courseFrontVo.getGmtCreateSort())) { //最新
                wrapper.orderByDesc("gmt_create");
            }

            if (!StringUtils.isEmpty(courseFrontVo.getPriceSort())) {//价格
                wrapper.orderByDesc("price");
            }

            baseMapper.selectPage(pageCourse,wrapper);

            List<EduCourse> records = pageCourse.getRecords();
            long current = pageCourse.getCurrent();
            long pages = pageCourse.getPages();
            long size = pageCourse.getSize();
            long total = pageCourse.getTotal();
            boolean hasNext = pageCourse.hasNext();//下一页
            boolean hasPrevious = pageCourse.hasPrevious();//上一页

            //把分页数据获取出来，放到map集合
            Map<String, Object> map = new HashMap<>();
            map.put("items", records);
            map.put("current", current);
            map.put("pages", pages);
            map.put("size", size);
            map.put("total", total);
            map.put("hasNext", hasNext);
            map.put("hasPrevious", hasPrevious);

            //map返回
            return map;
        }

    @Override
    public
    CourseWebVo getBaseCourseInfo(String courseId) {

            return baseMapper.getBaseCourseInfo(courseId);

    }


}
